acid-, acidi-, acido-, -acidity

(Latin: sour [sharp])

acid

1. Sour, tart, sharp to the taste; of the taste of vinegar.
2. A sharp, bitter, or sarcastic quality in speech or writing.
3. A sour substance, in chemistry: A substance belonging to a class of which the commonest and most typical members are sour, and have the property of neutralizing alkalis, and of changing vegetable blues to red; all of which are compounds of hydrogen with another element or elements (oxygen being generally the third element), and in the decomposition of a compound substance are relatively electro-negative, and borne to the positive pole.

1. Rain, or other precipitation that has an excessive concentration of sulfuric or nitric acids.
2. A popular term for the atmospheric deposition of acidified rain, snow, sleet, hail, acidifying gases and particles, as well as, acidified fog and cloud water.
3. Rain, snow, sleet or fog water having a pH less than 5.65.
4. The deposition of acidifying substances from the atmosphere during a precipitation event.

acid test

A decisive test that establishes the worth or credibility of something (from the use of nitric acid to test gold).

acidalbumin

A protein that dissolves in acids and shows an acid reaction.

acidaminuria

An excess of amino acids in urine.

acidemia, acidaemia

1. A condition in which blood pH is below normal.
2. A condition in which the acidity of the blood is much higher than normal and desirable.

It is one feature of severe untreated diabetes.

acidhead

Someone who takes the illegal drug LSD regularly (slang).

acidic

1. Sour or bitter in taste.
2. Of, pertaining to, or of the nature of, an acid.

acidiferous

Producing or yielding an acid.

acidifiable (adjective)

Capable of being converted into, or of combining so as to form, an acid.

acidification

1. The process of becoming acid, e.g., when soil or water is polluted by acid rain.
2. The act or process of acidifying; conversion into an acid.

acidified

Made acid; converted into an acid.

acidifier

Anything that acidifies, or generates an acid.

The name was originally given (in error) to oxygen, as the supposed active agent in producing acids.